Audra McDonald sings "It Don't Mean a Thing if it Ain't Got That Swing" (Ellington) on the Carnegie Hall's 120th Anniversary120th Anniversary Gala Performers:Audra McDonald, VocalistEmanuel Ax, PianoGil Shaham, ViolinNew York PhilharmonicAlan Gilbert, Music Director and ConductorYo-Yo Ma, CelloComplete video here: http://video.pbs.org/video/1944846095/